If you don't want to look through the log files, just use the "s" command while the miner is running then copy the output and put it into your config file. Whats in the log file is what is displayed in real time in the CMD window.
I am the co-developer of MultiPoolMiner (
www.multiPoolMiner.io).
Unfortunately your approach is not an option... our software (and similar software based on the MPM core, e.g. NemosMiner, RainbowMiner) requires an all-automatic way with no user intervention.
Oh I did not know you was trying to integrate it into another system. Hmm... I guess you would need some type of API to get the optimized -gt value and insert it into the config file for the next time it restart its automatically there. Is there any kind of way you can monitor the output of the miner and parse the -gt value and insert it into the config file?