| GB.AddString | Adds a string to another one. |
| GB.ExtendString | Expands a string. |
| GB.FreeString | Releases a string. |
| GB.MatchString | Checks if a string matches a specified pattern. |
| GB.NewString | Creates a new string. |
| GB.StringLength | Returns the length of a string. |
| GB.SubstAdd | Substitution callback helper. |
| GB_SUBST_CALLBACK | Substitution callback datatype. |
| GB.SubstString | Substitutes strings inside a pattern. |
| GB.ToZeroString | Converts a Gambas string into a temporary null-terminated string. |
| GB.strcasecmp | Compares two ASCII strings, by ignoring the case. |
| GB.strncasecmp | Compares two ASCII strings, by ignoring the case, up to a specified length. |
| GB.tolower | Converts an ASCII string to lower case. |
| GB.toupper | Converts an ASCII string to upper case. |