Anyone know how to export Visio to gerber?

[BTB]

Trying to make PCB layouts in Visio and then create the gerber format files
for PCB fabricators.

 

[Michel LAPLANE]

I am interesting in developping conversion fonction from visio and to
visio. I have developped an acad converter that support all format including
2006, perhaps i can had your format file. Where can i find specification of
the gerber format. ?