die Pforte
reception
The reception area or porter's lodge at the entrance of a larger building such as a company, hospital, or hotel.
Bitte melden Sie sich bei Ihrer Ankunft an der Pforte.
Please check in at reception when you arrive.

gate / reception
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reception
The reception area or porter's lodge at the entrance of a larger building such as a company, hospital, or hotel.
Bitte melden Sie sich bei Ihrer Ankunft an der Pforte.
Please check in at reception when you arrive.

'Die Pforte' (the gate/reception) is an elevated or formal word for an entrance. It is not used for a normal door in an apartment, but for entrances to important or large buildings.
Der Besucher wurde an der Pforte des Ministeriums kontrolliert.
The visitor was checked at the reception of the ministry.
In the context of a reception area, typical phrases are 'sich an der Pforte melden' (to check in at reception), 'den Ausweis an der Pforte vorzeigen' (to show one's ID at reception), or 'etwas an der Pforte abgeben' (to leave something at reception).
Könnten Sie dieses Paket bitte für mich an der Pforte abgeben?
Could you please leave this package at reception for me?
In this meaning, 'Pforte' describes a large, often symbolic gate. It is found in literary or religious contexts, for example 'die Pforte des Himmels' (the gate of heaven) or 'die Pforte zur Unterwelt' (the gate to the underworld).
Die goldene Pforte des Tempels beeindruckte alle Besucher.
The golden gate of the temple impressed all the visitors.
door
'die Tür' and 'die Pforte' can both close or open an entrance. 'Tür' is the normal word for everyday situations: in an apartment, in a room, on a car, or on a cupboard. 'Pforte' is used more for a special or large entrance, for example at a church, a castle, or a monastery. It sounds more formal or solemn and less everyday. If you are talking about a normal apartment, 'Tür' is natural. For an old or special building, 'Pforte' can be more precise or more stylistic.

Vor der alten Kirche bleibt Nele einen Moment an der schweren Pforte stehen.
In front of the old church, Nele stops for a moment at the heavy gate.
Ali hört das Telefon nicht, weil die Tür zum Wohnzimmer geschlossen ist.
Ali doesn't hear the phone because the door to the living room is closed.