GAUSS 9和10下有 Ctrl+L，
You can repeat any of the last 20 lines entered into the command buffer by pressing CTRL+L to
cycle through the last command buffer.

弹出buffer，之后如果不希望立即执行，可以用鼠标点击，否则直接回车就可以了。确实没有matlab上方便

GAUSS 12里 貌似没有
程序编辑器里所有快捷键如下：
Programming Editor Hot Keys
CTRL+A Select All.
CTRL+C Copy.
CTRL+D Debug current file.
CTRL+F Find and replace.
CTRL+G Go to line.
CTRL+I Formats the current file.
CTRL+L Delete line.
CTRL+N Open new file.
CTRL+O Open existing file.
CTRL+P Print file.
CTRL+/ Used for block commenting.
CTRL+R Run current file.
CTRL+S Save current file.
CTRL+T Switches current line with the line above.
CTRL+V Paste.
CTRL+W Closes the current file.

Reference: http://www.aptech.com/pdf_manuals.html