Perhaps the GAPQPA function IsomorphismFpAlgebra AlgebraAsQuiverAlgebra
can be used to obtain what you want?
I tested the following small example:
LoadPackage("qpa");
p := 3;
K := GF(p);
G := CyclicGroup(p);
KG := GroupRing(K, G);
A := Image(IsomorphismFpAlgebraAlgebraAsQuiverAlgebra(KG));
F := FreeAlgebraOfFpAlgebra(A);[1];
R := RelatorsOfFpAlgebraRelationsOfAlgebra(A);