the plugin u where using might be this one:
https://forums.alliedmods.net/showthread.php?t=93716
there are a few plugins which contain the minugun. (dono if all can be used by normal players)
and with rotating we mean something different than u.
we want to rotate it if we are not using it. means, rotate it about 90° and then use it as normal.
example:
u've spawned the minigun facing north.
=> u can shoot everything in the area in front of u. all from left (west) to the right (east)
if u now rotate the gun clockwise about 90°, the minigun would face east.
=> u can shoot everything in the area in front of u. all from left (north) to the right (south)
so u would be able to use the same minigun without rebuilding it.