B787 Captain reported receiving a glideslope warning during an unstable approach. They decided to continue the approach and land safely.

Narrative

Base leg for visual XXL downwind descending from 6;000 ft to 1800 ft. Turned in close and high by approach of XXL at ZZZ. Tailwind of 27 knots. Ended up at FAF (ZZZZZ) at approximately 185 - 180 Knots gear down flaps 20. G/S did not capture and commanded level off. Autopilot still on at this time. Touchdown elevation was set as soon as we passed ZZZZZ. A/C staring adding power and leveling off. Auto pilot disengaged shortly [after] ZZZZZ. Aircraft now higher and faster 185 knots approximately. I deployed speed brakes and started descending trying to catch glide slope. Hit 1000 foot gate. Flaps to 25 then 30. Slowing but coming down too fast. Descended through glide slope. Got 'GLIDESLOPE' warning approximately 700 feet. Transitioned visually to PAPI; showing two red one white. Continued to 500 ft call. Aircraft approximately 8 knots above target flaps 30 landing checklist complete. Asked crew verbally if they were comfortable with continuing. They said yes; I said stable and continued approach. Keeping 2 red and 1 white on PAPI. Landed in touchdown zone. Uneventful rollout and taxi to gate.