Well it is light in the sense that these are drugs that are good at what they do - but they are relatively weak. I wouldn't expect to gain much mass, but you may experience a pretty dramatic change in your appearance if you are relatively lean to begin with.
You said that you are extremely gyno prone. Does that mean any dose of test at all is out of the question?
Even if test is out, you should consider trenbolone (fina). It won't add that much more weight, but it is a very strong androgen and is relatively cheap.