Goeienavond Gaynor

there's not much more in the baptism entry from Simon then you already said
page 92v - image 93 Brussel/Bruxelles parish Sint-Gaugericus / Saint Gaugericus (or St Gery), 4th March 1768
Simon Josephus filius legitimus
Joannis Gallemaert et Joanna Mariae De Rom
conj[ugum] natus hac nocte circa 12 suscep[tores] Simon Josephus
Marichox et Martina De Meij.
Simon Josephus ligitimate son of Joannes Gallemaert and Joanna Maria De Rom, spouses, born this night at circa 12 o'clock. The godparents were Simon Josephus Marichox and Martina De Meij.
some Latin
https://familysearch.org/learn/wiki/en/Latin_Genealogical_Word_ListI guess that your search was too complex, using less search criteria will give you better results.
e.g : Plaats or Lieu : Brussel/Bruxelles (you can select a place by clicking on the grid next to Plaats or Lieu)
then (search criteria Eerste persoon or Première personne) :
- Naam (or Nom) : Gallemaert this gives 236 results, you can narrow it down by clicking on
- alle rollen (or tous les rôles) and then on : Bruidegom (or Epoux) this gives 18 results (including the one you need)
arrange the search results e.g : click above the search results on Datum (or Date) for descending or ascending order, …
if you prefer the french version :
http://www.arch.be/index.php?l=en&m=online-resources&r=search-engines&sr=search-persons click on Search persons
groetjes en tot later
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