Anthony Gill has his most career points per game against the Celtics, with 7.3 per game.

anthony gill highest career ppg by opponent

OPP	PPG	GP	MPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
Celtics	7.3	8	15.6	2.6	1.5	0.1	0.0	0.4	2.4	5.6	42.2	0.4	1.8	21.4	2.1	2.5	85.0	125	58	21	12	1	0	3	15	-17
Nets	6.0	7	15.0	2.0	0.7	0.6	0.3	0.6	2.4	4.1	58.6	0.4	1.1	37.5	0.7	1.1	62.5	105	42	14	5	4	2	4	18	-14
Warriors	5.8	4	11.4	3.3	0.8	0.0	1.3	0.3	2.3	2.8	81.8	0.3	0.5	50.0	1.0	1.0	100.0	45	23	13	3	0	5	1	1	+18
Bucks	5.8	8	14.6	2.5	0.4	0.1	0.0	0.5	2.5	4.4	57.1	0.4	0.9	42.9	0.4	0.6	60.0	117	46	20	3	1	0	4	12	+29
Rockets	5.2	5	15.4	3.6	1.4	0.4	0.0	0.6	2.0	4.6	43.5	0.4	1.6	25.0	0.8	1.2	66.7	77	26	18	7	2	0	3	7	+8
Kings	5.0	4	17.5	3.8	1.3	0.5	0.5	0.8	1.5	3.8	40.0	0.0	1.0	0.0	2.0	2.5	80.0	70	20	15	5	2	2	3	11	-7
Cavaliers	4.8	10	11.9	1.8	0.9	0.4	0.1	0.3	1.5	2.9	51.7	0.4	1.1	36.4	1.4	1.8	77.8	119	48	18	9	4	1	3	18	+23
Spurs	4.8	5	10.4	1.6	0.4	0.2	0.4	0.0	1.8	3.0	60.0	0.4	0.8	50.0	0.8	1.4	57.1	52	24	8	2	1	2	0	4	-6
Bulls	4.3	10	11.1	1.4	0.6	0.2	0.0	0.1	1.4	2.7	51.9	0.2	0.8	25.0	1.3	1.7	76.5	111	43	14	6	2	0	1	16	-31
Trail Blazers	4.0	4	11.1	1.3	0.5	0.5	0.3	0.3	1.8	4.0	43.8	0.0	0.3	0.0	0.5	0.5	100.0	44	16	5	2	2	1	1	5	+5
Hawks	4.0	5	11.9	2.2	0.6	0.0	0.0	0.6	1.8	2.8	64.3	0.0	0.4	0.0	0.4	0.8	50.0	60	20	11	3	0	0	3	5	0
Timberwolves	3.8	5	10.6	2.2	0.8	0.2	0.6	0.0	1.6	3.2	50.0	0.2	0.8	25.0	0.4	0.4	100.0	53	19	11	4	1	3	0	3	-28
Heat	3.8	9	9.2	1.7	0.4	0.1	0.6	0.4	1.6	2.8	56.0	0.1	0.4	25.0	0.6	0.8	71.4	83	34	15	4	1	5	4	9	+19
76ers	3.8	8	10.4	1.9	0.6	0.1	0.5	0.8	1.5	2.6	57.1	0.1	0.5	25.0	0.6	1.0	62.5	83	30	15	5	1	4	6	8	+11
Mavericks	3.6	5	12.4	2.4	0.6	0.2	0.2	1.0	1.2	2.0	60.0	0.2	0.6	33.3	1.0	1.0	100.0	62	18	12	3	1	1	5	11	+18
Nuggets	3.0	4	7.4	2.0	0.3	0.3	0.3	0.0	1.0	1.8	57.1	0.0	0.3	0.0	1.0	1.5	66.7	30	12	8	1	1	1	0	1	+17
Thunder	3.0	3	9.5	3.7	1.3	0.7	0.0	0.3	1.3	2.3	57.1	0.3	1.0	33.3	0.0	0.0		29	9	11	4	2	0	1	1	+21
Hornets	2.9	9	8.7	2.0	0.6	0.0	0.2	0.3	1.0	2.3	42.9	0.1	0.3	33.3	0.8	0.8	100.0	78	26	18	5	0	2	3	7	-18
Pistons	2.7	10	9.7	1.8	0.4	0.0	0.2	0.6	1.0	2.1	47.6	0.1	0.4	25.0	0.6	0.6	100.0	97	27	18	4	0	2	6	11	+39
Pelicans	2.4	5	7.4	1.8	0.6	0.2	0.2	0.4	1.0	2.0	50.0	0.4	1.0	40.0	0.0	0.0		37	12	9	3	1	1	2	3	-8
Clippers	2.3	3	10.8	1.7	0.0	0.3	0.0	0.3	0.7	0.7	100.0	0.3	0.3	100.0	0.7	0.7	100.0	33	7	5	0	1	0	1	3	+1
Knicks	2.3	6	5.1	1.0	0.5	0.2	0.0	0.5	0.8	1.0	83.3	0.2	0.3	50.0	0.5	0.5	100.0	31	14	6	3	1	0	3	2	+1
Pacers	2.0	8	7.0	0.9	0.4	0.1	0.1	0.3	0.6	1.4	45.5	0.4	0.6	60.0	0.4	0.5	75.0	56	16	7	3	1	1	2	9	-2
Raptors	2.0	7	6.4	2.3	0.0	0.1	0.3	0.1	0.4	1.9	23.1	0.0	0.7	0.0	1.1	1.6	72.7	44	14	16	0	1	2	1	6	-36
Suns	1.7	7	4.2	0.9	0.0	0.3	0.1	0.4	0.6	0.9	66.7	0.1	0.3	50.0	0.4	0.4	100.0	29	12	6	0	2	1	3	3	+9