Bueno lo que te sale es lo correcto:
El codigo del script es el siguiente:
#!/usr/bin/env gbs3
dim a as integer
print "Content-type: text/html"
print ""
print "<html> <head><title>Sample CGI Script</title></head> <body>"
print " <h3> Sample CGI Script </h3>"
print "gambas gbs3 (gambas-script) <br>"
print "Ejemplo bucle for...next<br>"
for a=0 to 10
print "Valor: "& str$(a) & "<br>"
next
dim a as integer
print "Content-type: text/html"
print ""
print "<html> <head><title>Sample CGI Script</title></head> <body>"
print " <h3> Sample CGI Script </h3>"
print "gambas gbs3 (gambas-script) <br>"
print "Ejemplo bucle for...next<br>"
for a=0 to 10
print "Valor: "& str$(a) & "<br>"
next
Nota:
Este script no lo ves porque se ejecuta por el servidor y no el cliente (tu navegador web)