Do we have documentation around SalesForce toolkits/etc. related to the gateway?
Hi you can find public documentation around the Gateway-Salesforce solution kit at: Salesforce Integration Solution Kit - CA API Gateway - 9.1 - CA Technologies Documentation
Also, Live API Creator 3.0 just released with a brand new SF connector. This is newer and the doc is at: Salesforce Data Source - 3.0 Live API Creator http://docs30.liveapicreator.com/creating-apis/database-connectivity/salesforce-data-source