Fixed #28525 -- Documented GDAL and GeoIP exceptions.

docs/ref/contrib/gis/gdal.txt

@@ -1832,3 +1832,15 @@ Settings
 A string specifying the location of the GDAL library.  Typically,
 this setting is only used if the GDAL library is in a non-standard
 location (e.g., ``/home/john/lib/libgdal.so``).
+
+Exceptions
+==========
+
+.. exception:: GDALException
+
+    The base GDAL exception, indicating a GDAL-related error.
+
+.. exception:: SRSException
+
+    An exception raised when an error occurs when constructing or using a
+    spatial reference system object.

docs/ref/contrib/gis/geoip2.txt

@@ -168,5 +168,13 @@ The basename to use for the GeoIP country data file. Defaults to
 The basename to use for the GeoIP city data file. Defaults to
 ``'GeoLite2-City.mmdb'``.
 
+Exceptions
+==========
+
+.. exception:: GeoIP2Exception
+
+    The exception raised when an error occurs in a call to the underlying
+    ``geoip2`` library.
+
 .. rubric:: Footnotes
 .. [#] GeoIP(R) is a registered trademark of MaxMind, Inc.