Ultra Cable is going to shred the everliving F out of Gosen OGSM.
Hybrids are a great tool for players who really like a particular string full-bed, but want to emphasize or de-emphasize one or two aspects of the main string. You could want a little less power, a little more spin, a little more feel, a little more softness and most combinations are achievable by mixing in the appropriate hybrid.
OGSM is wonderfully crisp while also being soft on the arm. However, it does not have the durability or the slickness to stand up to something so sharply edged like Ultra Cable. I expect such a combination to play wonderfully for 30 mins to 2 hours, before the OGSM notches like crazy and locks up your mains.
If you are looking to soften up UC, I suggest something like Tier One Ghostwire.