Hi Mark,
Kodak Matchprint Inkjet (MPI) v3.1.5 is almost 10 years old, dating from just before G7 was released to the general market. We are now on v8.0 of MPI proofing software, and have bundled support for the latest GRACoL color aims. (MPI 8.0 additionally supports the Epson SureColor P-Series 6000, 7000, 8000, and 9000.)
Setting GRACoL 2013 as your destination ICC profile will target your proofer at the GRACoL color target, which is aligned with G7 aims for commercial printing on number 1 grade coated stock. Within the scope of normal G7-based press-proof setup, you may find for your particular printing condition that it is more appropriate to use one of the other G7-aligned color targets from the CRPC family defined in CGATS.21 or ISO 15339, of which GRACoL 2013 is just one. For example, if you are printing primarily on publication stock, SWOP 2013 is more appropriate. The choice of proofing paper also impacts what you can actually do with your proofer. For example, you probably don't want to use a publication proofing paper to try to and reproduce GRACoL 2013.
Keep in mind that G7 certification is something that you do for your printing shop, as part of becoming a G7 Master Printer. In practice, this means aligning your printing and printing practices with G7, then ensuring that your proofing represents a print condition which you can hit reliably and easily. You may find, for example, that you want to apply substrate correction adjustment (SCA) to one of the standard profiles (like GRACoL 2013 or SWOP 2013) in order to get a color target more closely aligned with your press paper. The SCA technique is widely practiced in the industry in conjunction with G7 implementations, and is supported by G7-certified Kodak ColorFlow Software.
Stephen Zmetana
Kodak Product Specialist