Dont fly your machine and I've never heard of V2GA but I think the speed you're looking for is referred to as approach climb speed. V2 is a calculated TO safety speed so effectively once you have passed it on TO it nolonger exists however since pilots are happy with the name and what it implies and it is conveniently printed in speed books etc and there is a box for it on the EFIS it is convenient to continue to refer to it during GA particularly during flap retract scedule OEI. Perf on most regional jets during GA OEI is such that to fly V2 would not meet the obstacle clearance criteria so speed is reduced to App Clmb spd to improve the gradient (is yr V2GA less than V2?) prior to level segment. If this is the case then it is a reduced bank spd. 25 degs plus 15 overbank generally refer to flap manoevre speeds.