How to define a starred custom gather new environment

I'm writing a file which I need the equations inside the gather environment to not be numbered.I was able to see the normal version (this answer, which works great:

\newenvironment{Lgather}{\useshortskip\leavevmode\vspace*{-\baselineskip}\fleqn\gather}{\endgather\endfleqn}  

But when I try to create the starred version, so the equations will not be numbered (that 1.1, 1.2... thing), it fails:

\newenvironment{Lgather}{\csname \useshortskip\leavevmode\vspace*{-\baselineskip}\fleqn\gather*\endcsname}{\csname \endgather*\endfleqn \endcsname}

I even tried

\newenvironment{Lgather}{\useshortskip\leavevmode\vspace*{-\baselineskip}\fleqn\gather*}{\endgather*\endfleqn} 

But it also fails...

Thank you very, very much in advance!