Hawker 800XP pilot reported during the approach they extended the landing gear and observed a red indication on the left main landing gear.

Narrative

During the approach to ZZZ; I requested flap 15; followed by gear down. Upon extension; we observed a red indication on the left main landing gear. I attempted to recycle the gear; however; the red indication persisted. We cross-checked the main gear indicator lights located near the manual pressurization control panel and verified two green lights for the main gear.I advised the tower of the situation and requested a low approach for a visual inspection of the landing gear. The tower confirmed that the gear appeared to be down and stated that the decision to land was at our discretion. I consulted with my co-pilot regarding the options of landing at ZZZ or diverting to our alternate airport; ZZZ1; which offers a longer runway. After a brief discussion; and considering both the cockpit indications and the tower's visual confirmation; I elected to proceed with a landing at ZZZ.Due to the loud gear warning horn; which made communication difficult; we pulled the horn circuit breaker. Additionally; we inhibited both the FLAP OVRD and TERR INHIB functions; as the aircraft system interpreted the gear as being up and generated multiple flap and terrain warnings.The landing was smooth and uneventful; and we taxied clear without further incident.Cause: This flight originated from ZZZ2; where the aircraft underwent inspections. Based on the maintenance activities performed and the proximity of the event to the aircraft's return to service; it is likely that the left main gear indication issue was related to maintenance or inspection work involving the landing gear system. Possible factors may include sensor misalignment; wiring connection issues; or rigging discrepancies. Suggestion: To prevent a recurrence of this type of event; it is recommended that a focused inspection and functional check of the landing gear indication system be performed following any major maintenance; including scheduled inspections. Special attention should be given to sensor alignment; wiring integrity; and system rigging. Additionally; a thorough operational check of the landing gear warning and indication systems during post-maintenance test flights would help to identify any anomalies before returning the aircraft to service.