I read it somewhere
edit: got an osprey book showing II/JG3 operating G2's in April 1944.
II/JG3 had 109G-2s in April 1943 - 34
May 1943 - 9
June 1943 - 3
July 1943 - 2
Not listed after July 1943. In April 1944 they had 44 Bf-109G6s reported as accessable.
Source.. well I read it somewhere.