Penn State (22-3, 8-0) is two wins away from tying the third-best regular season record in program history.
"The offensive line room has made some great strides. We've got to keep improving, but I think we're in a great spot right now."
The Nittany Lions recorded multiple hat tricks in its upset over the Terrapins.
The 6'6" guard played in 66 games at VCU, averaging 3.7 points and 2.1 rebounds per game in two seasons with the program.
Gratton's younger brother Dylan remains as a Nittany Lion.
Johnson will reconnect with former Penn State hoops head coach Pat Chambers at Florida Gulf Coast.