This is a clinical trial studying intravenous infusions of allogeneic gamma delta T cells after receiving low dose radiotherapy in participants with locally advanced or metastatic non-small cell lung cancer or solid tumors with bone metastases to evaluate the safety and efficacy of combining immunotherapy with radiation therapy.

In this clinical trial, or 'study', participants with locally advanced or metastatic, non-small cell cancer (NSCLC) or solid tumors with bone metastases, will receive KB-GDT-01, an allogeneic (cells from healthy donors) gamma delta T-cell product. All participants will receive KB-GDT-01 as intravenous infusions in combination with radiotherapy.

After being informed about the study and its potential risks, during the 28-day screening period, all consented participants will have laboratory tests, assessments, tumor scans, and a tumor biopsy.

Cytokine release syndrome symptoms and other potential adverse effects, will be monitored during the dose limiting toxicity period.

The study will be conducted in 2 parts, with the same number of visits in each part.

In Part 1 Dose Escalation, the study will attempt to identify the best dose with the lowest incidence of adverse effects (AE) and try to identify if the KB-GDT-01 is working (effectiveness). In Part 2 Dose Expansion the best dose will be further investigated for AE and effectiveness. There will be up to 36 participants in Part 1 and up to 21 additional participants in Part 2 of the study.

The total treatment period of the study drug protocol will be completed in 31 days. Participants will then attend clinic visits during a 30-day short-term follow-up period, with a subsequent long-term follow-up period up to 12 months.

Inclusion Criteria:

• Signed and dated informed consent form.
• Male or female, > 18 years old.
• Minimum body weight of 50 kilograms (kg).
• Eastern Cooperative Oncology Group (ECOG) performance status of 0-1.
• Histologically or cytologically confirmed locally advanced or metastatic NSCLC or locally advanced or metastatic solid tumor with bone metastasis
• Progressed on SOC therapy including platinum-based chemotherapy and immune checkpoint inhibitors (NSCLC), and are not a candidate for further standard anti-neoplastic therapy and/or have exhibited intolerance to and/or declined clinically applicable salvage therapies, and/or have declined therapy.
• Genomic screening, with tumors with known actionable molecular alterations, such as EGFR, ALK, ROS-1, BRAF, RET, MET, and KRAS etc., must have progressed on appropriate target-directed molecular therapy.
• At least one measurable target lesion based on RECIST v1.1 confirmed by radiological imaging. Participants with isolated bone metastases are eligible for enrollment are not required to have measurable disease
• All toxicity associated with previous treatments are recovered to CTCAE grade of ≤1, except for continuing alopecia.
• Adequate hematopoietic, hepatic and renal function
• Agree to adequate contraception for up to 120 days after the last dose of study drug.
• Negative serum pregnancy test for women of childbearing potential
• All primary and metastatic disease sites are amenable to LDRT
• For solid tumors with bone metastases subjects (Part 2 Cohort B): receiving zoledronic acid for solid tumors with bone metastases

Exclusion Criteria:

• Chemotherapy, investigational, and/or check-point inhibitor therapy within the 30 days prior to study Day 1.
• Major surgery, except for vascular access placement, within the 30 days prior to study Day 1.
• Active autoimmune disease requiring immunosuppressive therapy.
• Infection requiring systemic treatment within 30 days prior to study Day 1.
• History of peritoneal effusion (ascites), pericardial, or pleural effusions/nodules.
• Uncontrolled hypertension, history of arrhythmia including atrial fibrillation, unstable angina, decompensated congestive heart failure, cardiac ejection fraction ≤ 50%, myocardial infarction, or marked baseline prolonged QT/QTc intervals.
• Human immunodeficiency virus (HIV), Hepatitis B, or Hepatitis C detection.
• Participation in the treatment portion of a clinical trial or completed a clinical trial within the 30 days prior to the first dose of KB-GDT-01.
• Presence of any condition that may, in the opinion of the Investigator, render the patient inappropriate from participating in the study.
• Breastfeeding or pregnant female, or patient is expecting to conceive or father children during the study.
• Allergy or intolerance to any of the study product ingredients or excipients.
• Live vaccines administered within 30 days prior to study Day 1.
• Individuals lacking capacity to consent for themselves.
• Superior vena cava obstruction
• Prior radiation therapy to a selected LDRT treatment site \