Conversion amber b0 and kb to gromac ITP format

GROMACS version:
GROMACS modification: Yes/No
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Hi I am trying to convert frcmod file to ITP.
Can someone guide me with formula for changing b0 and kb values with units please.

For instance if we have amber BOND entry as
A-B 100.000 2.000

What will be its bondtype entry in gromacs